sperm selection by females

In article <Pine.SCO.3.95.961122092043.24042A-100000 at lex.lccc.edu>,
rcb1 at LEX.LCCC.EDU says...
>>Nature 17 October 1996 pg 585.
>Swedish female sand lizards mate with any male. Yet genetic
>analysis shows that conception is usually with the most distance
>males genetically speaking.
>>Binstock and Kohl have suggested that human females prefer males
>that are immulogically dissimilar using olifaction.
>>I would suggest that olifaction can work as a selection mechanism.
Chemosensory signal processing systems are generally believed to
help ensure that conspecifics mate for genetic diversity. There also are
several studies supporting speculation that this occurs in humans.
>Also olifaction may be the key for understanding killer sperms who sole
>job is to kill another's males sperms and increase the probability
>that a second person to mate will be the father.
There are receptors on sperm cells that are somewhat similar to olfactory
receptors in the nose.
Jim Kohl